GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: bin/mt/mt.c Lines: 0 102 0.0 %
Date: 2017-11-07 Branches: 0 91 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: mt.c,v 1.38 2015/12/30 14:59:10 tedu Exp $	*/
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/*	$NetBSD: mt.c,v 1.14.2.1 1996/05/27 15:12:11 mrg Exp $	*/
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/*
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 * Copyright (c) 1980, 1993
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/*
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 * mt --
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 *   magnetic tape manipulation program
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 */
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/mtio.h>
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#include <sys/stat.h>
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#include <sys/disklabel.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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#include "mt.h"
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struct commands {
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	char *c_name;
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	int c_code;
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	int c_ronly;
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	int c_mincount;
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} com[] = {
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	{ "blocksize",	MTSETBSIZ,  1, 0 },
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	{ "bsf",	MTBSF,      1, 1 },
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	{ "bsr",	MTBSR,      1, 1 },
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	{ "density",	MTSETDNSTY, 1, 1 },
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	{ "eof",	MTWEOF,     0, 1 },
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	{ "eom",	MTEOM,      1, 1 },
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	{ "erase",	MTERASE,    0, 1 },
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	{ "fsf",	MTFSF,      1, 1 },
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	{ "fsr",	MTFSR,      1, 1 },
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	{ "offline",	MTOFFL,     1, 1 },
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#define COM_EJECT	9	/* element in the above array */
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	{ "rewind",	MTREW,      1, 1 },
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	{ "rewoffl",	MTOFFL,     1, 1 },
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	{ "status",	MTNOP,      1, 1 },
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	{ "retension",	MTRETEN,    1, 1 },
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#define COM_RETEN	13	/* element in the above array */
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	{ "weof",	MTWEOF,     0, 1 },
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	{ NULL }
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};
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void printreg(char *, u_int, char *);
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void status(struct mtget *);
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void usage(void);
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int		_rmtopendev(char *path, int oflags, int dflags, char **realp);
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int		_rmtmtioctop(int fd, struct mtop *cmd);
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struct mtget	*_rmtstatus(int fd);
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void		_rmtclose(void);
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extern char	*__progname;
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char	*host = NULL;	/* remote host (if any) */
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int
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_rmtopendev(char *path, int oflags, int dflags, char **realp)
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{
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#ifdef RMT
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	if (host)
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		return rmtopen(path, oflags);
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#endif
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	return opendev(path, oflags, dflags, realp);
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}
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int
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_rmtmtioctop(int fd, struct mtop *cmd)
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{
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#ifdef RMT
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	if (host)
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		return rmtioctl(cmd->mt_op, cmd->mt_count);
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#endif
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	return ioctl(fd, MTIOCTOP, cmd);
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}
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struct mtget *
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_rmtstatus(int fd)
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{
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	static struct mtget mt_status;
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#ifdef RMT
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	if (host)
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		return rmtstatus();
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#endif
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	if (ioctl(fd, MTIOCGET, &mt_status) < 0)
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		err(2, "ioctl MTIOCGET");
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	return &mt_status;
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}
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void
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_rmtclose(void)
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{
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#ifdef RMT
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	if (host)
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		rmtclose();
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#endif
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}
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int	eject = 0;
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int
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main(int argc, char *argv[])
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{
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	struct commands *comp;
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	struct mtop mt_com;
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	int ch, mtfd, flags, insert = 0;
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	char *p, *tape, *realtape, *opts;
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	size_t len;
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	if (strcmp(__progname, "eject") == 0) {
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		opts = "t";
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		eject = 1;
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		tape = NULL;
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	} else {
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		opts = "f:";
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		if ((tape = getenv("TAPE")) == NULL)
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			tape = _PATH_DEFTAPE;
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	}
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	while ((ch = getopt(argc, argv, opts)) != -1) {
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		switch (ch) {
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		case 't':
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			insert = 1;
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			break;
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		case 'f':
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			tape = optarg;
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			break;
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		default:
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			usage();
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		}
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	}
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	argc -= optind;
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	argv += optind;
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	if (eject) {
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		if (argc == 1) {
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			tape = *argv++;
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			argc--;
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		}
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		if (argc != 0)
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			usage();
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	} else if (argc < 1 || argc > 2)
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		usage();
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	if (tape == NULL)
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		usage();
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	if (strchr(tape, ':')) {
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#ifdef RMT
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		host = tape;
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		tape = strchr(host, ':');
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		*tape++ = '\0';
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		if (rmthost(host) == 0)
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			exit(X_ABORT);
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#else
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		err(1, "no remote support");
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#endif
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	}
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	if (eject) {
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		if (insert)
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			comp = &com[COM_RETEN];
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		else
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			comp = &com[COM_EJECT];
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	} else {
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		len = strlen(p = *argv++);
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		for (comp = com;; comp++) {
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			if (comp->c_name == NULL)
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				errx(1, "%s: unknown command", p);
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			if (strncmp(p, comp->c_name, len) == 0)
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				break;
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		}
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	}
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	flags = comp->c_ronly ? O_RDONLY : O_WRONLY | O_CREAT;
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	/* NOTE: OPENDEV_PART required since cd(4) devices go through here. */
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	if ((mtfd = _rmtopendev(tape, flags, OPENDEV_PART, &realtape)) < 0) {
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		if (errno != 0)
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			warn("%s", host ? tape : realtape);
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		exit(2);
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	}
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	if (comp->c_code != MTNOP) {
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		mt_com.mt_op = comp->c_code;
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		if (*argv) {
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			mt_com.mt_count = strtol(*argv, &p, 10);
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			if (mt_com.mt_count < comp->c_mincount || *p)
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				errx(2, "%s: illegal count", *argv);
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		}
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		else
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			mt_com.mt_count = 1;
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		if (_rmtmtioctop(mtfd, &mt_com) < 0) {
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			if (eject)
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				err(2, "%s", tape);
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			else
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				err(2, "%s: %s", tape, comp->c_name);
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		}
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	} else {
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		status(_rmtstatus(mtfd));
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	}
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	_rmtclose();
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	exit(X_FINOK);
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	/* NOTREACHED */
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}
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struct tape_desc {
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	short	t_type;		/* type of magtape device */
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	char	*t_name;	/* printing name */
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	char	*t_dsbits;	/* "drive status" register */
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	char	*t_erbits;	/* "error" register */
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} tapes[] = {
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#define SCSI_DS_BITS	"\20\5WriteProtect\2Mounted"
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	{ 0x7,		"SCSI",		SCSI_DS_BITS,	"76543210" },
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	{ 0 }
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};
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/*
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 * Interpret the status buffer returned
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 */
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void
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status(struct mtget *bp)
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{
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	struct tape_desc *mt;
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	for (mt = tapes;; mt++) {
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		if (mt->t_type == 0) {
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			(void)printf("%d: unknown tape drive type\n",
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			    bp->mt_type);
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			return;
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		}
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		if (mt->t_type == bp->mt_type)
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			break;
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	}
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	(void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
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	printreg("ds", bp->mt_dsreg, mt->t_dsbits);
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	printreg("\ner", bp->mt_erreg, mt->t_erbits);
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	(void)putchar('\n');
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	(void)printf("blocksize: %d (%d)\n", bp->mt_blksiz, bp->mt_mblksiz);
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	(void)printf("density: %d (%d)\n", bp->mt_density, bp->mt_mdensity);
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}
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/*
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 * Print a register a la the %b format of the kernel's printf.
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 */
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void
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printreg(char *s, u_int v, char *bits)
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{
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	int i, any = 0;
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	char c;
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	if (bits && *bits == 8)
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		printf("%s=%o", s, v);
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	else
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		printf("%s=%x", s, v);
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	if (!bits)
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		return;
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	bits++;
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	if (v && *bits) {
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		putchar('<');
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		while ((i = *bits++)) {
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			if (v & (1 << (i-1))) {
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				if (any)
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					putchar(',');
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				any = 1;
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				for (; (c = *bits) > 32; bits++)
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					putchar(c);
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			} else
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				for (; *bits > 32; bits++)
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					;
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		}
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		putchar('>');
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	}
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}
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void
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usage(void)
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{
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	if (eject)
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		(void)fprintf(stderr, "usage: %s [-t] device\n", __progname);
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	else
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		(void)fprintf(stderr,
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		    "usage: %s [-f device] command [count]\n", __progname);
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	exit(X_USAGE);
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}